Let me build some credibility here: I have been working out for roughly a decade, have gained over 70lbs, and was ranked in the advanced category (set by ExRx standards) of dead lift, squat, and bench.

Now, my suspicion is that the target demographic for this "works out" for social benefits, not for actually making fitness progress. I say this because someone who takes fitness seriously would never drop $1500 on an accessory that a pen and journal wouldn't be more than capable for. For that kind of money a home gym is more than accessible. Even a few kettlebells for even 1/4th of that would get someone into phenomenal shape. For a significant amount of my fitness career I did yoga at a local studio and met many of the target demographic. Many wanted a way to stay in shape while also having a social aspect. This abrogates the social aspect while having a sub par fitness experience. I can only think of a demographic that doesn't understand fitness at all, has significant money, and doesn't want the social aspects of a group fitness class; this demographic is probably niche.